/*
 * Copyright 2017 StreamSets Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.streamsets.pipeline.stage.origin.jdbc.CT;

import com.streamsets.pipeline.api.Config;
import com.streamsets.pipeline.api.StageException;
import com.streamsets.pipeline.api.StageUpgrader;
import com.streamsets.pipeline.api.impl.Utils;
import com.streamsets.pipeline.config.upgrade.UpgraderUtils;
import com.streamsets.pipeline.stage.origin.jdbc.CommonSourceConfigBean;

import java.util.List;

public class SQLServerCTSourceUpgrader implements StageUpgrader {
  public static final String ALLOW_LATE_TABLE = "commonSourceConfigBean.allowLateTable";

  @Override
  public List<Config> upgrade(
      String library,
      String stageName,
      String stageInstance,
      int fromVersion,
      int toVersion,
      List<Config> configs
  ) throws StageException {
    switch (fromVersion) {
      case 1:
        upgradeV1ToV2(configs);
        break;
      default:
        throw new IllegalStateException(Utils.format("Unexpected fromVersion {}", fromVersion));
    }
    return configs;
  }

  private void upgradeV1ToV2(List<Config> configs) {
    configs.add(new Config(ALLOW_LATE_TABLE, false));

    // upgrade queryInterval to queriesPerSecond
    final String numThreadsField = "ctTableJdbcConfigBean.numberOfThreads";
    final Config numThreadsConfig = UpgraderUtils.getConfigWithName(configs, numThreadsField);
    if (numThreadsConfig == null) {
      throw new IllegalStateException(String.format(
          "%s config was not found in configs: %s",
          numThreadsField,
          configs
      ));
    }
    final int numThreads = (int) numThreadsConfig.getValue();

    CommonSourceConfigBean.upgradeRateLimitConfigs(configs, "commonSourceConfigBean", numThreads);
  }
}
